Region
United States
201
Colorado
79
California
25
New Jersey
14
Montana
13
Alaska
10
Washington (State)
10
Idaho
9
Nevada
9
Pennsylvania
8
China
7
Missouri
6
San Francisco Bay
6
Arizona
5
Michigan
5
New Mexico
5
Utah
5
Alamosa River Watershed
4
Eagle County
4
Kansas
4
Puget Sound
4
West (U.S.)
4
Arkansas River
3
Arkansas River Watershed
3
Carson River Watershed
3
Florida
3
Georges Bank
3
Illinois
3
India
3
Kansas River Watershed
3
Massachusetts
3
Minnesota
3
Monmouth County
3
New Hampshire
3
Northwest, Pacific
3
Nova Scotia
3
Oklahoma
3
Palo Alto
3
Park County
3
Spokane River Watershed (Idaho and Wash.)
3
Virginia
3
Alabama
2
Animas River Watershed (Colo. and N.M.)
2
Atlee Region
2
Bayan Obo
2
Boston Harbor
2
Brazil
2
Chalk Creek (Chaffee County)
2
Clark Fork Watershed (Mont. and Idaho)
2
Coeur d'Alene River Watershed
2
more ...